BBk shorty headers

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really? whats wrong with them

Useless mod, worth maybe 2-3 HP. The factory manifolds are not really that restrictive. LT's would be your best bet because they are designed to use the exhaust pulses to help pull exhaust gas out of the engine (scavenging effect). For the effort involved to install shorties on a modular engine, you're better off spending your time/money elsewhere. If your hell bent on buying headers, save up for some LT's.
 
i got udp bbk plenum jlt intake ram hdx clutch exaust 4.10s short throw and a 75 shot the kid just told me 100 bucks for them and i thought that was cheap but i didnt no if they were any good and worth my time puting on
 
save your money and buy PI cams (people usually sell them for ~$100). That would be the best bang for buck. Will give you ~15 HP.

Long tube headers and midpipe would be decent but do not give good bang for buck.